data_list = ['pythin', 'java', 'python', 'php']
num = data_list.count("python")
print(num)
print(data_list.count("java"))
print(data_list.count("C++"))


val_list = ["web自动化", "UI自动化", "接口自动化"]
val_list.append("app自动化")
print(val_list)
val_list.append(11)
print(val_list)

val_list = ["web自动化", "UI自动化", "接口自动化"]
val_list.insert(1,"app自动化")
print(val_list)
val_list.insert(6,"java")
print(val_list)

info1 = [1,2,3]
info2 = [4,5,6]
info1.extend(info2)
print(info1)
print(info2)

val_list = ["web自动化", "UI自动化", "接口自动化", "app自动化", "java"]
val_list.pop(2)
print(val_list)
val_list.pop()
print(val_list)